World's largest collection of serial killer artwork and other macabre exhibits.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

Eco-friendly island mansion.

Hundreds of protractors affixed to surfaces all over the city.

This stunning concert hall has become a symbol of Iceland's national recovery.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

Look closely and you’ll notice that the color changes a third of the way up the tower.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Olfactory delights in San Francisco's Botanical Gardens.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

An office built to look like a giant basket.

Memorializing an American tragedy of massive proportions.

This dramatic rail curve was once the target of a failed Nazi attack.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

This North Carolina store preserves a historic moment in America's movement for racial equality.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.